public:99_annexes:annex-b-terms-and-definitions:n:node_set

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public:99_annexes:annex-b-terms-and-definitions:n:node_set [2026/09/12 17:42] – removed - external edit (Unknown date) 127.0.0.1public:99_annexes:annex-b-terms-and-definitions:n:node_set [2026/09/12 17:43] (current) – ↷ Links adapted because of a move operation nick_dido
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 +====== Node Set ======
  
 +[[public:99_annexes:annex-b-terms-and-definitions:start|Go up to Terms and Definitions]]
 +
 +===== Discussion =====
 +
 +A Node Set is an identified collection of [[public:99_annexes:annex-b-terms-and-definitions:n:node|Nodes]] grouped for a defined purpose.
 +
 +The purpose of a Node Set can concern:
 +
 +  * Configuration
 +  * Deployment
 +  * Operation
 +  * Communication
 +  * Governance
 +  * Security
 +  * Testing
 +  * Observation
 +  * Comparison
 +  * Validation
 +  * Administration
 +
 +A Node Set provides an identity for the collection independently of the identities of its member Nodes.
 +
 +A Node Set can identify:
 +
 +  * The Node Set identity
 +  * The purpose of the Node Set
 +  * The member Nodes
 +  * The role of each member Node
 +  * The relationships among member Nodes
 +  * The applicable configuration
 +  * The applicable network topology
 +  * The applicable Governance Policies
 +  * The applicable security controls
 +  * The applicable operational conditions
 +  * The applicable Test Definitions
 +  * The Node Set version
 +  * The membership effective period
 +  * The Provenance of the Node Set
 +  * The Traceability of the Node Set
 +
 +A Node can belong to more than one Node Set when each membership represents a distinct defined purpose.
 +
 +A Node Set can include Nodes realized using different technologies or assigned to different [[public:99_annexes:annex-b-terms-and-definitions:d:deployment_target|Deployment Targets]].
 +
 +A Node Set can form part of a [[public:99_annexes:annex-b-terms-and-definitions:t:test_environment|Test Environment]]. The Test Environment can use multiple Node Sets for different test roles or operational purposes.
 +
 +===== Definition =====
 +
 +//identified collection of [[public:99_annexes:annex-b-terms-and-definitions:n:node|Nodes]] grouped for a defined purpose//
 +
 +===== Source =====
 +
 +Adapted from:
 +
 +  * DIDO Reference Implementation Conceptual Model, Node Set
 +  * DIDO Reference Architecture, system-of-Nodes and network concepts
 +  * [[public:99_annexes:annex-b-terms-and-definitions:n:node|Node]]
 +  * [[public:99_annexes:annex-b-terms-and-definitions:d:distributed_system|Distributed System]]
 +  * [[public:99_annexes:annex-b-terms-and-definitions:t:test_environment|Test Environment]]
 +  * DIDO-TE draft Requirements Register
 +  * DIDO-TE architecture and testing concepts
 +
 +The definition identifies the collection and its purpose without prescribing the technology, topology, deployment, ownership, or operational role of the member Nodes.
 +
 +===== Note =====
 +
 +A Node Set is not necessarily a complete [[public:99_annexes:annex-b-terms-and-definitions:d:distributed_system|Distributed System]].
 +
 +A Distributed System identifies coordinated system behavior across multiple networked Nodes. A Node Set identifies a collection of Nodes grouped for a defined purpose.
 +
 +A Node Set can contain:
 +
 +  * Every Node in a Distributed System
 +  * A subset of the Nodes in a Distributed System
 +  * Nodes from more than one Distributed System
 +  * Reference Nodes
 +  * Changed Nodes
 +  * Test-control Nodes
 +  * Observation Nodes
 +  * Simulated Nodes
 +  * Emulated Nodes
 +  * Physical Nodes
 +  * Virtual Nodes
 +
 +Membership in a Node Set does not by itself establish:
 +
 +  * Network connectivity
 +  * Deployment location
 +  * Common ownership
 +  * Common implementation technology
 +  * Common Node Role
 +  * Authorization to operate the Nodes
 +  * Participation in the same Distributed System
 +
 +The governing definition, configuration, or policy establishes those characteristics.
 +
 +A Node Set differs from a Test Set:
 +
 +  * A Node Set groups Nodes
 +  * A Test Set groups Test Cases, other Test Sets, or related Test Objects
 +
 +A change to Node Set membership can create a new Node Set version when membership affects reproducibility, comparison, validation, governance, or operation.
 +
 +===== Example =====
 +
 +A [[public:99_annexes:annex-b-terms-and-definitions:d:dido-te|DIDO-TE]] Test Environment contains five DIDO Nodes.
 +
 +Four validated Nodes form a reference Node Set. A fifth Node contains a changed implementation and belongs to a changed-node Node Set.
 +
 +The Test Environment uses the two Node Sets to identify the validated reference configuration and the configuration containing the changed Node.
 +
 +The Node Sets identify the grouped Nodes and their testing purposes without requiring all member Nodes to use the same realization technology or Deployment Target.
 +
 +----
 +
 +<WRAP centeralign>
 +© 2026 Dido Solutions, Inc. and Jackrabbit Consulting, Inc.
 +</WRAP>